Deep-well pump



R. L. DENNISON DEEP WELL PUMP April 30, 1929.

Filed Jan. 20, 1927 amm Patented Apr. 30, 1929.

`UNITED STATES PATENTo FFICE.

` DEEP-WELL PUMP.

Application led January 20, 1927. Serial No. 162,354.

This invention relates to deep well pumps of the impeller type.

As is well known, it has been proposed to provide deep well pumps wherein a drive shaft is mounted axially within the well tubing and provided at spaced intervals with iinpellers, such as those olE the screw type. Such pumps have been found to work satisfactorily but are inei'licient due to losses resulting from the inherent characteristics of the iinpellers. lil ith p uinps of this type,the rotation oi the shalt is transmitted to the tluid being pumped in. two directions, namely upwardly, and outwardly due to centrifugal force. The pro pellers ot the screw type usuallyr employed in pumps of this character operato within smooth bores which oder no assistance to the pump in ellecting an upward movement of the fluid, and the centrifugal force thus exerted is wholly lost, thus rendering the pumps ineiii cient.

An important object of the present invention is to provide a pump of the character out lined having means for increasing its eiiiciency whereby a greater volume of liquid may be pumped with the saine power application.

A further object is to provide a pump o't' the character referred to having means adapted to utilize the centrifugal force for assisting in the lifting action, thus increasing the elllciency of the pump.

A further object is to provide a pump employing a drive shaft having screw impellers mounted therein at spaced interals and provided with peripheral bands having spiral inwardly extending ribs which are adapted to assist in the lifting action of the pump as the impellers are rotated.

A further object is to provide a pump of the above mentioned character having means arranged adjacent each of the impellers for overcoming the swirling action'of the water to permit theadjacent inipeller more efficiently to act upon the liquid.

Other objects and advantages of the invention will become apparent during the course oi? the following description.

ln the drawings I have shown one embodiment of the invention. In this showing Figure 1 is a centralvertical sectional view through a portion of the apparatus,

Figure il is a section on line of F igiiire l,

Figure 3 is a similar View on line `3-3 of i Figure 1, and, 1

Figure 4 is a detail section through one of the impellers.

Referring to the drawingsthe numeral l() designates a plurality of well tube sections arranged in axial alignement. The upper end of each section is externally threaded for reception within the internally threaded lower" end of a coupling member 11, theinternal diameter of which is preferably equal to the internal diameter of the tube sections. Each coupling 11 provided with a hub 12 bav-` inga bearing bushingl therein to rotatably receive a drive shaft 14, this shaft preferably being made up of a` plurality of sections 15, as clearly shown in Figure 1. `Each coupling 1l also is provided with a pluralityof preferably integral radial fins 16 for to be described.

The upper end of each coupling 11 ex ternally threaded for reception within the lower internally threaded end of another couplingr member 17, the latter having an enlarged lower end 18 provided with the internal threads. coupling 17 is internally threaded to receive the externally threaded lower end of adjacent tube section 10.

.An impeller indicated as a whole by the numeral 19 is arranged in each coupling 17. Each of the impellers is provided with a hub 20,' and the ends of the shaft sections are 4preferably threadedin this hub whereby the latter serves as a coupling member` for the shaft sections. Each impeller further includes a surrounding band 21 which is rotatable within the corresponding coupling` 17, `and the internal diameter of the band 21`is preferably equal to the internal diameters of the tube sections and the coupling 1l. Spiral blades 92 are carried by each impeller and are preferably formed integral therewith. In the form ot' the invention shown, each i1n peller is illustrated as being provided with two diametrically opposite blades. Between the blades 22, the band 21` is providedwitha plurality of inwardly extending preferably integral ribs 23 which are spirally arranged and correspond to the pitch of the blades 22. Y The operation of thedevice is as follows: `The shaft 15 is driven at a relatively high speed ai the usual manner a feta@ the imi a purpose i the next y The upper end ofeach Uli pellers, and the blades of the latter are adapt-ed to eltect an upward rnoveinent'of the liquid being pumped. This rotating movement is transmitted to the liquid in two directions, naniely, upwardly, and outwardly radially ot the shalt. Ordinarily, the radial forces are completey lost and the pumping action effected is the result only el the upward force exerted by the impellers. lt has been found that the provision ol the ribs 23 serves to transform the radial movement into an upward movement since the liquid is .not permitted to lie against the smooth surrounding wall and to slip thereagainst. Attention is invited to the tact that the inner surfaces ot the bands 2l 'torni substantial coi'itinuations of the surfaces o'l2 the tube sections and the coupling 1l, thus minimizing i'rictional resistance toY the movement of the liquid. This actionalso is assisted by virtue ot the fact that the diameters ot the hubs 12 and 2O are equal. The tins 16 serve to straighten the direction of travel ot the liquid to eliminate the swirling action thereof, as the liquid approaches the next higher impeller, thus assisting in minimizing the swirling action again delivered to the liquid by the succes sive impellers.

It will be obvious that the apparatus is adapted to be readily assembled. by virtue oit' its sectional construction as illustrated in Figure 1. Each successive shaft section is placed in position and the shaft section is connected to the hub of one oit the impellers, whereupon the next coupling 17 and tube sec tion l0 is placed in position. It also will be apparent that the device readily may be disassembled tor the purpose et making repairs.

By virtue of the increased etliciency provided by the pumping action, it has been itound that the apparatusV is particularly adapted for use as a deep well pump.

lt is to be understood that Athe form oit the invention herewith shown and described is to betaken as a preferred example of `the same and that various changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope oi the subjoined claims.

l claim:

l. Apparatus of the character described comprising a well tubing, a rotatable shaft mounted axially within said tubing, au iinpeller carried by said shaft, said iinpeller including a pitched blade, a sleeve surrounding the blade and rotatable therewith, and means carried by and projecting inwardly Atroni said sleeve for minimizing circumiierential slippage ot fluid against the interior of said sleeve.

2. Apparatus of the character described comprising a well tubing, a rotatable shaft mounted axially within said tubing', an impeller carriedby said shaft, said impeller includinga hub, a pitched blade carried by said hub, a sleeve surrounding said blade and rotatable therewith, and an inwardly pir-ejecting rib lormed on the inner surface elf said sleeve and pitched similarly to said blade.

3. Apparatus ot the character described comprising a well tubing 'formed et a pair ot alined sections, a coupling connecting the adjacent ends of said sections and having an internal diameter larger than the internal diameter ot' said sections, al rotatable shaft mounted axially within said tubing, a hub carried by said shaft within said coupling, a pitched blade carried by said hub, a sleeve surrounding said blade and rotatable tl1erewith, said sleeve having its outer iacc substantially contacting with s .id coupling aud having an internal diameter substantially equal to the internal diameter ol. said tubing sections, and means carried by and projecting inwardly from said sleeve lor minimizing circumferential slippage ci lluid against the inner surface of said sleeve.

ll. Apparatus oit the character described con'iprising a well tubing formed et a pair of alined sections, 'a coupling connecting the adjacent ends el said sections and having an internal diameter slightly larger than the internal diameter of said sections, a rotatable shalt mounted axially within said tubing, a hub carried by said shalt within said coupling, a pitched blade carried by said hub, a sleeve surrounding said blade and rotatable therein, said sleeve having its outer face substantially contacting with said coupling and having an internal diameter substantially equal to the internal diameter 01": said tubing sections, and a rib formed integral with said sleeve and projecting inwardly therefrom, said rib being pitched similarly to said blade.

5. Apparatus of the character described comprising awell tubing formed of upper and lower alined sections, a coupling arranged on the upper end of the lower section and hav ing an internal diameter substantially equal to the internal diameter of said sections, an axial bearing carried by said coupling, a shaft rotatable in said bearing, an upper coupling connecting the upper end of said lirstnamed coupling with the lower end of the upper tubing section, said upper coupling having an internal diameter larger than the internal diameter of said sections, a hub carried by said shaft within said upper coupling, a plurality ot' pitched blades carried by said hub, a sleeve rotatable in said upper coupling and connected to the outer edges ol" said blades, and means carried by and projecting inwardly from said sleeve lor minimizing circumferential slippage of luid within said sleeve.

6. Apparat-us of the character described comprising a well tubing termed of upper and lower alined sections, a coupling arranged on the upper end of the lower section and having an internal diameter substantially equal to the internal diameter of said sections, an axial bearing carried by said coupling, a shaft rotatable in said bearing, an upper coupling connecting the upper end of said lirst named coupling with the lower end of the upper tubing section, said upper coupling having an internal diameter larger than the internal diameter of said sections, a hub carried by said shaft within said upper couiling, a plurality of pitched blades carried y said hub, a sleeve rotatable in said upper coupling and connected to the outer edges of said blades, and a plurality of ribs formed integral with said sleeve and projecting in-V wardly from the inner face thereof, said ribs being spaced from said blades and pitched similarly thereto.

7. Apparatus of the character described comprising a well tubing formed of upper and lower alined sections, a coupling arranged on the upper end of the lower section and having an internal diameter substantially equal to the internal diameter of said sections, an axial bearing carried by said coupling, a shaft rotatable in said bearing, an upper coupling connecting the upper end of said first named coupling with the lower end of the upper tubing section, said upper coupling having an internal diameter larger than the internal diameter of said sect-ions, a hub carried by said shaft within said upper coupling, a plurality of pitched blades carried by said hub, a sleeve rotatable in said i upper coupling and connected to the outer ranged on the upper end of the lower section and having an internal diameter substantially equal to the internal diameter of said sections, an axial bearing carried by said coupling, a shaft rotatable in said bearing, an upper coupling connecting the upper end of said first named coupling with the lower end of the upper tubing section, said upper coupling having an internal diameter larger than the internal diameter of said sections, a hub carried by said shaft within said upper coupling, a plurality of pitched blades carried by said hub, a sleeve rotatable in said upper coupling e and connected tothe outer edges of said blades, a plurality of ribs formed integral with said sleeve and (projecting inwardly from the inner face thereof, said ribs being spaced from said blades and pitched simi-` larly thereto, and a plurality of longitudinally extending tins formed integral with and connected between said bearing and said first named coupling.

In testimony whereof I aiiix my signature.

ROBERT L. DENNISON. 

